Passports, which Rosas had required for traveling from one part of Buenos Ayres to another, had been abolished. The property of Rosas had been declared to belong to the State. Public affairs wore an appearance of encouraging tranquillity. From ECUADOR we have news of the progress of the invading force under Gen. Flores. He had reached the Island of Puna, in the river a few miles below the city of Guayaquil, and had taken possession of it. He had under his command a large man-of-war and three other vessels, transports, for conveying his troops. He had anchored off the island, waiting for expected reinforcements. The Government of Ecuador had a force of about 4000, with which it was preparing to resist his invasion. It had addressed a circular to all the representatives of foreign powers, threatening to treat as pirates all who should aid him. The pretext for his attack grows out of proceedings while he was President of Ecuador, an office which he held for two years. He then packed a convention, caused a new constitution to be adopted, and had himself proclaimed President for eight years longer. These proceedings caused a revolution which drove him out of the country, first making an agreement with the leaders of the revolution that they should pay him $70,000 and an annual salary, with military pensions for his officers, as the condition of his leaving. The present Government does not feel bound to fulfill these stipulations, and has refused to pay him his salary. The ostensible object of his expedition is to enforce its payment; but its success would of course place the government in his hands. He has no party of adherents in the country. It is stated that the American ship _Lyons_ had left Valparaiso with 350 men and large supplies of ammunition to join him. MEXICO.